Avoid unnecessary redrawing of vehicle list windows

Redraw info section every tick if values have changed

src/vehicle_gui.h

@@ -61,6 +61,8 @@ void ShowVehicleListWindow(CompanyID company, VehicleType vehicle_type);
 void ShowVehicleListWindow(CompanyID company, VehicleType vehicle_type, StationID station);
 void ShowVehicleListWindow(CompanyID company, VehicleType vehicle_type, TileIndex depot_tile);
 
+void DirtyVehicleListWindowForVehicle(const Vehicle *v);
+
 /**
  * Get the height of a single vehicle in the GUIs.
  * @param type the vehicle type to look at